Reducing-valve.



A. w. CASH.'

mum@ VALVE. I APYLIUATIOI IILED AUG.. 2 3, 1909.

my ron normen UNITED sTATEs PATENT oEEroE.

ARTHUE w. casu, 0E NEWARK, NEW JERSEY.

REDUCING-VALVE. c

Specication of Letters Iatent. Y Patented Apr. 26, 1910.

Application filed August 23,1909. vSerial No. 514,332.

age; to `provide. positive limiting stops for' the movement of thediaphragm in either direction, and to do this without impeding orinterfering with the action of the valve proper; to enable the differentparts to be separable, both from each other and from the diaphragm; toprovide a construction in which only small parts are liable to havetheir action affected by corrosion, and thus enable the valve to be mademainlyof cast iron or the like; to safeguard against any possibleleakage to the valve-proper, and to obtain other advantages and resultsas may be brought out in the following description.

Referring to the accompanying drawings,

in which like numerals of reference indicate corresponding parts'in eachof the several figures, Figure 1 is aside elevation of my improvedreducing and regulating valve, looki lng at the end of the dischargeduct or outlet; Fig. 2 is a central vertical section takenlongitudinally of the How passage, as on'line 2 2 of Fig. l; Fio. 3 is a`detail cross section on line 3-3 ota Fig. 2, Fig. 4 is a detailvertical section, taken on line 4 4 of Fig. 2, and at right angles tothe plane of the section shown in said Fig. 2.

In said drawings, l() and 11 indicate the upper and lower portions orhalves, respectively, of the body of the valve, said portions 10 and 11having at their adjacent ends peripheral flanges 12 and 13, adapted tofit atwise together and be secured by bolts 14. A diaphragm 15ispreferably laid between the two halves or portions l0 and 11, andclamped at its edges between the annular fianges 12 and 13 thereof. Theupper portion 10 of the valve provides an interior chamber 16 whichtapers upwardly intoa cylindrical neck 17. On opposite sides of saidupper portion 10, below the top of the said neck 17 are inlet and outletopenings 18 and 19,' respectively, each interiorly threaded toreceive asuitable duct or pipe.

Into the innen ena 2o of the inlet 1s 'in driven a nipple 21 whichprojects into the. chamber 16 of the upper portion 10 and has aninterior passage 22 vleading near the eX- tremity of the nipple outthrough anaperture 23 lat the upper lside of the nipple, said apertureforming an outwardly facing valve seat-In the neck 17 of the valveportion 10,` above the said nipple 21, is av bushing y24 which providesa vertical slideway for a valve 25 whose lower end 26 is fitted to thevalve seat 23. The barrel 27 of thev valve'- proper is hollow from itsrear end, and the exterior of said barrel is shown in the drawings asflattened at four opposite sides, asl

at 28, so as to permit flow from its front end to its rear end throughthe bushing 24. Obviously other equivalent means of permitting this flowor venting could be employed, such as longitudinally grooving either ofthe surfaces of the valve barrel and bushing which are vin slidingcontact, boring through the end of the valve adjacent to its end 26,l

or the like.

I lpon the end of the neck 17 or its bushing 24 1s screwed cap 29 andbetween said cap and the valve 25, and lying within the chamber of saidvalve 25, is a helical spring 30 which is adapted to seat the said valveinto the aperture 23 with a force far in excess of the fiow.l pressureto the reducing valve or initial pressure. Between the valve 25 and thediaphragm 15 is a centrally disposed post 31 which sets at its closedend upon the said diaphragm, and straddling the nipple 21 engages at itstwo prongs or bifurcated ends the lower end of the valve 25 around itslower portion 26. The upper end of said post fits loosely in theguideway formed by the contracting upper portion of the chamber 16, andthus the vsaid post is kept in vproper alinement with the valve 25'.

In the chamber 32 of the lower portion or hali:` 11 of the valve body isa circular plate33 adapted to rest centrally against the diaphragm 15'and at its opposite or unv der side to receive the end of av heavyhelical spring 34, the other end of said spring receiving a follower 35against which pressesl an adjusting screw 36 threaded through the wallof the valve casing portion llf Obviously by adjusting said screw '36the tension of. the spring 34 upon the plate 33 can be varied asdesired. The marginal edges of said plate 33 are adapted to rest upon anannular stop 37 on the interlor of the body portion 11, as said shoemoves. downward, and this feature provides a limit to downward flexionof the said diaphragm. A vent or aperture 38 in the wall of the bodyportionll serves to7 equalize the airpressure inside and outside of thelower valve portion 11.

It will be understoodthat the spr-ing 34 is set to overcome the spring30 by an amount of pressure less than the delivery pressure required,and thus s aldvpr'essure of the spring 311 will be transmitted throughthe shoe 33, diaphragm 15, and post 31 to unseat the valve 25 and permitinflow through the nipple 2l. Obviously when said flow has continued,however, until the pressure 1n the chamber 16 of the upper portion 10of` the valve casing exceeds the dierence between the pressures of thesprinvs 34- and 30, 'said pressure exerted upon the diaphragm 15 willdepress'the same until the valve 25 is allowed to close under the actionof the spring 30. Undue bending of the diaphragm l5 downward isprevented by the shoe 33 engaging the stop 37, as above stated, andundue movement of the diaphragm 1n the opposite or upward direction isprevented by the valve 25 seating against the cap -29u The cap 29 ispreferably perforated as at 39 and provided with an outer chamber 40 inwhich is a ball valve 41 pressed by a spring 4:2 against the aperture39,the end of the chamber 40 being closed by a plug 43. The said spring42 exerts a pressure upon the ball -l very slightly in excess of thedelivery pressure of .the valve, and thus said ball acts as a safetyvalve to relieve the delivery end of the reducing valve in case itspressure should from any reason become too high. Connection is provided,as at 44.-, for the attachment of an escape pipe (not shown) for anysuch overflow.

ltfly improved valve is especially designed for reducing and regulatingthe pressure of water, as from a supply pipe to the service pipes of abuilding or the like, but it 1s equally well adapted for steam, gas, airor other iiuids. Furthermore, the nipple 21 and valve 25 and its bushing24, being separable can be made of high-priced non-corrosive metal as isnecessary for their proper operation, while all the rest of the valvecan be made of cast iron or other low-priced material, and great economyobtained.

Having thus described the invention, what I claim is:

l. 1n a reducing valve, the combination of upper and lowerinteriorly-chambered casing portions, said upper portion providing aslideway, an imperforate diaphragm between said casing portions, aninlet nipple projecting into the chamber of the upper portion and havinga lateral aperture providing an out-Ward valve seat, a valve for saidseat mounted in said slideway of the body porceases tion, a springnormall seating said valve, a post abutting loose yat its extremitiessaid valve and diaphragm, a spring in the lower casing portion adaptedto exert pressure upon said diaphragm, and means for adjustlng thetension of said spring.

2. In a `reducing valve, the combination of a chambered casing portionhavin@ a slidevvay at one end, a movable member c osing the other end ofsaid casing portion, means for exerting adjustable pressure on saidmember, a nipple projecting into the chamber of the easing portionintermediate of its ends and having therein a lateral aperture providingan outward valve seat, a valve for said seat mounted in said slideway ofthe casing portion, a spring normally seating said valve, and' a. postabutting loosely at its extremities said valve and movable member.

3. In a. reducing valve, the combination of a chambered casing portionhaving a. slideway at one end and having its Walls adjacent to saidslideway forming a guideway, a movable member closing the other end ofsaid casing portion, means for exerting adjustable pressure on saidmember, a nipple projecting into said guidcway through its side andhaving therein a lateral aperture providing a valve seat facing the saidslideway, a valve for said seat mounted in said slideu way, a springnormally seating said valve, and a post slotted to receive said nippleabutting loosely at its extremities the said movable member and valveand held by said guideway in alinement with said valve.

4. 1n a reducing valve, the combination of a casing portion providing aninterior chamber and a neck at its upper end, a movable member closingthe other end of said casing portion, means for exerting an adjustablepressure upon the side of' said movable member away from the casingportion, an inlet nipple projecting into the chamber of said. casingportion and having therein a. lateral aperture providing an outwardvalve seat, a valve adapted to slide in said neck of the casing portionand close said valve seat, said valve being hollovved at its end awayfrom the valve seat, and providing communication between its tvvoopposite ends, a spring in said valve, a. cap for said neck of thecasing portion and a post seated at its closed end on the diaphragm andstraddling said nipple with a forked end in engagement with `said valve5. In a. reducing valve, the combination of a casing portion providingan interior chamber and a neck at its upper end, a movable memberclosing the other end of said casing portion, means for exerting anadjustable pressure upon the side of said movable member away from thecasing portion, an inlet nipple projecting into the chamber of' saidcasing portion and having therein a of the casin portion and close saidvalve movable' member.

seat,4 said va ve' being hollowed at its end lateral aperture providingan outward valve ture'initself, a safety valve for said aperseat, avalve adapted to slide in said neck ture, and a post between said valveand 10 away fromjthe valve seat, and providing ARTHUR W CASH'communication between its two opposite` In the presence 0fends, a springin said valve, a cap for said RUSSELL M. EvERE'rT,

neck of the casing portion having an aper- FREDERICK GERMANN, Jr.

